#### Test One

1. A survey is given to 100 Kitti residents to determine whether Kitti residents want the road paved all the way to the Madolehnihmw border. At issue is whether the road will impact the local culture.  Kepar, Enipein, Wone, and Rohi are very traditional.   Pavement would make it easier for outsiders to enter this area.
1. What is the population?

2. What is the sample?

3. What is your own opinion: Should roads be built and paved into very traditional areas such as southern Kitti, Walung, or Rumung?

2. The sibling data from our class is an example of what level of measurement?

3. Suppose I want to be sure to collect data from students from all four states in the FSM at the national campus of the College.  I decide to pull random samples consisting of ten students from each state.  What type of sampling is this?

4. The age of the students in MS 150 Statistics this term is given by the following data set:

18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 24, 24, 25, 25, 26
1. What is the range for this data?___________________________
2. Divide the range into 4 intervals (classes).  Record the intervals below.
Interval (Class) Tally Relative Frequency

_______________

_______________

_______________

_______________

_______________

_______________

_______________

_______________

_______________

_______________

_______________

_______________
3. Tally the data into the intervals (classes) in the table above.  Include your class upper limit (CUL) in the class.

4. Sketch a histogram of the data, labeling your horizontal axis as appropriate.

5. Calculate the relative frequency for each interval (class) in the table above.
6. Find the mode of the data ___________
7. Find the median of the data ___________
8. Find the mean of the data given.___________
9. Calculate the (xi - mean)² values for each age value, writing the result for each age in the table below.
Age (xi - mean)²
18 __________
19 __________
19 __________
20 __________
20 __________
21 __________
21 __________
21 __________
22 __________
22 __________
22 __________
22 __________
23 __________
23 __________
23 __________
24 __________
24 __________
25 __________
25 __________
26 __________

Sum S(xi - mean)²:

__________
10. Calculate the sum of the (xi - mean)² and record this in the last row of the table above.
11. What is the value of n for this data set? _____________
12. Find the sample standard deviation of the data given using the formula: